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Commit c9a45028 authored by Alistair Delva's avatar Alistair Delva
Browse files

ANDROID: dummy_cpufreq: Implement get() 

Fixes panic in time_cpufreq_notifier+0x94 caused by notifying the x86
TSC synchronization code that a CPU frequency change has occurred, but
not properly updating policy->cur beforehand, causing a division by
zero.

Link: https://github.com/ClangBuiltLinux/linux/issues/756


Change-Id: I687093bbdb402a13341762bf9d91dd7f9daffe8b
Signed-off-by: default avatarAlistair Delva <adelva@google.com>
parent 0b383e29

drivers/cpufreq/dummy-cpufreq.c

+6 −0
Original line number Diff line number Diff line
@@ -22,6 +22,11 @@ static int dummy_cpufreq_driver_init(struct cpufreq_policy *policy) 
	return cpufreq_table_validate_and_show(policy, freq_table);

}



static unsigned int dummy_cpufreq_get(unsigned int cpu)

{

	return 1;

}



static int dummy_cpufreq_verify(struct cpufreq_policy *policy)

{

	return 0;
@@ -31,6 +36,7 @@ static struct cpufreq_driver dummy_cpufreq_driver = { 
	.name = "dummy",

	.target_index = dummy_cpufreq_target_index,

	.init = dummy_cpufreq_driver_init,

	.get = dummy_cpufreq_get,

	.verify = dummy_cpufreq_verify,

	.attr = cpufreq_generic_attr,

};